A variable frequency control method and device for an oil well pump combining a dynamometer diagram and a dynamic liquid level
A frequency conversion control and dynamometer technology, applied in pump control, liquid variable capacity machinery, machines/engines, etc., can solve the problems of unsatisfactory energy saving effect and single input of frequency conversion control, achieve significant energy saving effect and overcome measurement errors and misadjustment, the effect of high measurement accuracy
Active Publication Date: 2018-06-05
贵州航天凯山石油仪器有限公司
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The object of the present invention is to provide a method and device for frequency conversion control of oil well pumps that combine the indicator diagram and the dynamic liquid surface, so as to solve the problem of single frequency conversion control input and energy saving effect Unsatisfactory technical problems, thereby overcoming the deficiencies of existing technologies
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0020] The schematic diagram of the device structure in this example is as follows figure 1 As shown, it is composed of indicator diagram acquisition unit, liquid level monitor, RTU or intelligent monitoring equipment, frequency converter, control panel, logic control unit, display module, wireless module and power module and other parts.
[0021] The dynamometer acquisition unit is composed of a load sensor and an angular displacement sensor. The load sensor is installed at the donkey head rope hanger to convert the pressure value into an analog value. The angular displacement sensor is installed at the beam bracket of the oil well pump to capture the angle of the beam during the up and down movement of the donkey's head, and convert the angle value into an analog value. The liquid level monitor is installed on the casing of the oil well pump, and is fired by inflating or deflating the gas cylinder to capture the downhole knot wave and liquid level wave, and obtain the oil we...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method and device for frequency conversion control of an oil well pump combining a dynamometer diagram and a dynamic liquid level. The invention simultaneously inputs the data of a dynamometer diagram acquisition unit and a liquid level monitor into an RTU or an intelligent monitoring device, The RTU or intelligent monitoring equipment judges the authenticity of the pump efficiency data of the current system based on the pump fullness calculated from the indicator diagram and the submergence of the oil pump obtained by the liquid level monitor, and uses the real pump efficiency data as an effective input for frequency conversion adjustment to determine Inverter frequency output results; to overcome the measurement error caused by a single detection parameter, to ensure the best energy-saving effect of the oil well pump system. The invention combines the indicator diagram and the dynamic liquid surface as the input basis of the frequency conversion control, effectively overcomes the measurement error and misadjustment caused by a single detection parameter. The invention has a simple structure and can realize frequency conversion adjustment functions in different modes such as manual, automatic and remote. The invention is suitable for the frequency conversion and energy-saving control system of the beam type oil well pump.
Description
technical field [0001] The invention relates to a frequency conversion control method and device for an oil well pump combining an indicator diagram and a dynamic fluid surface, and belongs to the technical field of oil field digital detection and control. Background technique [0002] With the development of energy-saving technology, the frequency conversion energy-saving technology of oil well pumps has been widely used. However, due to the complexity of oil well conditions and the limitation of downhole conditions, the frequency conversion control method is still limited to manual or single parameter detection control methods. A satisfactory energy-saving effect can be achieved. Commonly used frequency conversion control methods include calculating the fullness of the downhole pump from the surface dynamometer diagram, automatically adjusting the frequency conversion output according to the pump fullness, and controlling the frequency conversion output through the electri...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06
Inventor 赵善国周胜根王先鹏谢雪峰
Owner 贵州航天凯山石油仪器有限公司